Stockfish

[Homayoun]

https://abrok.eu/stockfish/
+++ 10 elo

Author: Muzhen Gaming
Date: Sat May 18 18:09:45 2024 +0200
Timestamp: 1716048585

VVLTC search tune

Tuned with 85k games at VVLTC.

VVLTC 1st sprt: https://tests.stockfishchess.org/tests/ ... ea45533ad7
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 14880 W: 3890 L: 3652 D: 7338 Elo +5.56
Ptnml(0-2): 0, 1255, 4694, 1489, 2

VVLTC 2nd sprt: https://tests.stockfishchess.org/tests/ ... ea45533b4f
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 24984 W: 6502 L: 6235 D: 12247 Elo +3.71
Ptnml(0-2): 1, 2178, 7867, 2445, 1

closes https://github.com/official-stockfish/S ... /pull/5264

Bench: 1198142

[Ghppn]

Thank you, Cubail!

[Homayoun]

Author: Viren6
Date: Sun May 19 09:37:22 2024 +0200
Timestamp: 1716104242

Revert "Simplify Away Quadruple Extensions"

This reverts commit 4edd1a3

The unusual result of (combined) +12.0 +- 3.7 in the 2 VVLTC simplification SPRTs ran was the result of base having only 64MB of hash instead of 512MB (Asymmetric hash).
Vizvezdenec was the one to notice this.

closes https://github.com/official-stockfish/S ... /pull/5265

bench 1404295

Co-Authored-By: Michael Chaly <26898827+>
https://abrok.eu/stockfish/

[Homayoun]

Author: MinetaS
Date: Tue May 21 08:46:12 2024 +0200
Timestamp: 1716273972

Remove cutoffCnt margin adjustment in razoring

Passed non-regression STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 65344 W: 16767 L: 16578 D: 31999 Elo +1.00
Ptnml(0-2): 198, 7557, 16987, 7718, 212
https://tests.stockfishchess.org/tests/ ... f886615a26

Passed non-regression LTC:
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 35214 W: 8999 L: 8791 D: 17424 Elo +2.05
Ptnml(0-2): 16, 3804, 9760, 4010, 17
https://tests.stockfishchess.org/tests/ ... f886615a52

closes https://github.com/official-stockfish/S ... /pull/5278

Bench: 1296223
https://abrok.eu/stockfish/

[Ghppn]

Thank you, Homayoun!

[Homayoun]

Thank you, Homayoun!

Best regards ,GHppn.

[Homayoun]

Author: Muzhen Gaming
Date: Thu May 23 21:37:46 2024 +0200
Timestamp: 1716493066

VVLTC search tune

Parameters were tuned in 2 stages:
1. 127k games at VVLTC:
https://tests.stockfishchess.org/tests/ ... e74c39f52a.
2. 106k games at VVLTC:
https://tests.stockfishchess.org/tests/ ... f886615a9d.

Passed VVLTC 1st sprt:
https://tests.stockfishchess.org/tests/ ... b18de4e410
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 20466 W: 5340 L: 5093 D: 10033 Elo +4.19
Ptnml(0-2): 0, 1796, 6397, 2037, 3

Passed VVLTC 2nd sprt:
https://tests.stockfishchess.org/tests/ ... b18de4e47d
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 15854 W: 4186 L: 3934 D: 7734 Elo +5.52
Ptnml(0-2): 1, 1367, 4938, 1621, 0

closes https://github.com/official-stockfish/S ... /pull/5286

Bench: 1558110

[Homayoun]

Author: Shahin M. Shahin
Date: Sun May 26 20:32:41 2024 +0200
Timestamp: 1716748361

Remove rootDelta branch

This makes rootDelta logic easier to understand, recalculating the value
where it belongs so removes an unnecessary branch.

Passed non-regression STC:
https://tests.stockfishchess.org/tests/ ... d5e27d8d8e
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 206016 W: 53120 L: 53089 D: 99807 Elo +0.05
Ptnml(0-2): 591, 20928, 59888, 21061, 540

closes https://github.com/official-stockfish/S ... /pull/5289

No functional change

https://abrok.eu/stockfish/

[dorsz]

What is it? https://tests.stockfishchess.org/tests/ ... d5e27db0d8
Is this result even possible with so strong hardware or it means that something is now wrong with the scaling?
And of course it is not +1000 Elo but +104 what can be found in the details, but is is still a lot.

[dorsz]

Just after I typed that here it appeared on https://abrok.eu/stockfish/ with the explanation.